Roger,
I am going to offer you another perspective that is not in contradiction to what you are hearing but possibly more in line with your situation. As pilots, we routinely buy and fly airplanes with extremely complex systems based on the inspections of knowledgeable people that we want to trust and based on our own appreciation of systems, complex and otherwise. Pre buy inspections with knowledgeable folks as well as culling through the information here on this Forum is how we started, from scratch, three years ago with a diesel pusher, having spent a grand total of one night in an RV.
As suggested, we stayed closed to home, worked through the little bugs, and some larger ones that would not have been found otherwise, and then set off, full time, learning quickly as we went. We are now in our fourth year, on our second coach, and have no intention of slowing down anytime soon.
We have profited immensely from our friends and research here, and have learned that there is not just one way to skin a cat or live this lifestyle. Your ability to adapt and improvise as you move forward is going to very key and you will learn to separate fact from fiction pretty quickly, just like you did when flying. Hangar flying is one thing, then there's you hanging in the straps trying to get your wits about you several thousand feet in the air.
Fortunately for the RV life, there are not so many potentially life threatening decisions to be made as when flying, but your willingness to research and admit what you don't know will carry you a long ways during all the little things that happen as your drive your home down the road. And there will be some.
There is plenty of exposure to making any large financial commitment, and RV's are as big a black hole as any airplane. Take your time, listen closely, and choose wisely. You won't be disappointed with having taken the extra steps and having done lots of homework.